TerraSAR-X & TanDEM-X

Transcription

1 TerraSAR-X & TanDEM-X David Miller DLR - Raumfahrt-Industrietage in Friedrichshafen 13./14. Mai 2009

2 Missions Overview TerraSAR-X & TanDEM-X Satellites with X-Band (9.65GHz) Synthetic Aperture Radar using an active antenna (electronic beam steering) High resolution flexible imaging independent of time-ofday/weather TerraSAR-X launched in June 2007; Commisioning Phase to December 2007 then successful operation to date (collection of nominal SAR data) TanDEM-X launch in October 2009: rebuild with additional Cold Gas System and Inter-Satellite Link Receiver Formation flying of TerraSAR-X & TanDEM-X for 3 years to collect Digital Elevation Model data (shared with nominal operation) Nominal operation for remainder of TanDEM-X life p2

3 Project Structure Public-Private Partnership between DLR and Astrium GmbH cooperation to meet scientific and commercial goals DLR provides the Ground Segment, owns the data and coordinates the scientific utilisation Astrium is the prime contractor for the Space Segment (including radar) and finances part of its cost Infoterra serves the commercial customers and provides a sales-dependent share of the operating costs GFZ Potsdam provides the Tracking, Occultation & Ranging Equipment Major Subcontract: EADS DE for the radar Central Electronics and Transmit-Receive Modules p3

4 Main Orbit/Satellite Characteristics Orbit Sun-synchronous 514km altitude/97.4 inclination 18:00 ascending pass 11 days repeat cycle Satellite About 5m length 1350kg mass Fixed Solar Array Deployable boom for X-band downlink antenna Left looking for short periods p4

5 p5 Satellite Blockdiagram Sync STR IMU CESS MAG MT RW LCT XDA PROP CGS TOR SSMM GPS ISLR RFEA OBC DCE S/W PRF TCS LAA RFE BAT PCDU Power for new H/W ACE Solar Generator IPDU Power Data Cmd/Ctl RF Only on TanDEM-X Already implemented on TerraSAR-X F E

6 TerraSAR-X & TanDEM-X KMUs Topic TerraSAR-X TanDEM-X Activities Harness Eurospace, Sommer as TSX Flight unit responsible Magnet Torquer ZARM as TSX Flight unit responsible Star Tracker DJO as TSX Flight unit responsible Reaction Wheels Teldix as TSX Flight unit responsible MGSE LICO (reused) Env Test Facilties IABG as TSX Antenna Subarrays - CFRP Waveguides Invent as TSX Important Flight Antenna Subarrays - Milling Schorpp as TSX Important Flight Antenna Subarrays - Feed Probe Soldering Haberer Spacetec as TSX Important Flight Antenna Subarrays - Glueing Xperion as TSX Important Flight Antenna Subarrays - Feed Probes Hubert & Suhner as TSX Important Flight Secondary Structure Freyer as TSX Radio Frequency Electronics Assembly (Warberry UK) Taubenreuther Flight unit responsible Inter Satellite Link Receiver n/a Taubenreuther Flight unit responsible Satellite Structure Xperion as TSX Important Flight CGS Unit Tester n/a Heske X-Band Down Link Assembly Tesat as TSX Flight unit responsible SSMM Modules & EGSE IDA (reused) Important Flight Telemeter NF Scanner (reused) p6

7 p7 First integration steps (October 2007)

8 Integration Overview & Status today Instrument Test Bed Reactivation CE1 + FM units & EM/FM mix+ spare TSX panel CE2 + EM/FM units + spare TSX panel Antenna Front-End Cold Gas System FlatSat & Satellite Component Proc/testing Reactivation & EM/FM mix Flatsat Feed Module Qual Structure Dry-run tests with FM units Satellite P1 P2 P12 Leaf B Leaf A Leaf C FM Integrated System Tests Environmental Test Campaign Launch p8

9 Contact Persons Project Manager David Miller Tel david.miller@astrium.eads.net System Engineer Stefan Funk Tel stefan.funk@astrium.eads.net p9